package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;

import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.CollectionUtils;

import java.math.BigDecimal;
import java.rmi.AlreadyBoundException;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
@Slf4j
public class OrderServiceImpl implements OrderService {

    @Value("${sky.shop.address}")
    private String shopAddress;

    @Value("${sky.baidu.ak}")
    private String ak;

    /**
     * 检查客户的收货地址是否超出配送范围
     * @param address
     */
    private void checkOutOfRange(String address){
        Map map = new HashMap();
        map.put("address",shopAddress);
        map.put("output","json");
        map.put("ak",ak);

        //获取店铺的经纬度坐标
        String shopCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3", map);

        JSONObject jsonObject = JSON.parseObject(shopCoordinate);
        //判断
        if (! jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("店铺地址解析失败");
        }

        //数据解析
        JSONObject location = jsonObject.getJSONObject("result").getJSONObject("location");
        String lat = location.getString("lat");
        String lng = location.getString("lng");
        //店铺经纬度坐标
        String shopLngLat = lat + "," + lng;

        map.put("address",address);

        //获取用户收货地址的经纬度坐标
        String userCoordinate = HttpClientUtil.doGet("https://api.map.baidu.com/geocoding/v3",map);

        jsonObject = JSON.parseObject(userCoordinate);
        //判断
        if (! jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("收货地址解析失败");
        }

        //数据解析
        location = jsonObject.getJSONObject("result").getJSONObject("location");
        lat = location.getString("lat");
        lng = location.getString("lng");

        //用户收货地址经纬度坐标
        String userLngLat = lat + "," + lng;

        map.put("origin",shopLngLat);
        map.put("destination",userLngLat);
        map.put("steps_info","0");

        //路线规划
        String json = HttpClientUtil.doGet("https://api.map.baidu.com/directionlite/v1/driving",map);

        jsonObject = JSON.parseObject(json);
        //判断
        if (! jsonObject.getString("status").equals("0")){
            throw new OrderBusinessException("配送路线规划失败");
        }

        //数据解析
        JSONObject result = jsonObject.getJSONObject("result");
        JSONArray jsonArray = (JSONArray) result.get("routes");
        Integer distance = (Integer) ((JSONObject)jsonArray.get(0)).get("distance");

        //判断
        if (distance > 50000){
            //配送距离超过50000米
            throw new OrderBusinessException("超出配送范围");
        }
    }

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private WeChatPayUtil weChatPayUtil;

    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WebSocketServer webSocketServer;

    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Override
    @Transactional
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {

        //1.处理各种业务异常,地址为空,购物车数据为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        //判断
        if (addressBook == null){
            //抛出异常
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }

        //检查用户的收货地址是否超出配送范围
        checkOutOfRange(addressBook.getCityName() + addressBook.getDistrictName() + addressBook.getDetail());

        //查询当前用户的购物车数据,根据用户id查询
        Long userId = BaseContext.getCurrentId();

        ShoppingCart shoppingCart = new ShoppingCart();
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCarts = shoppingCartMapper.list(shoppingCart);

        //判断
        if (shoppingCarts == null || shoppingCarts.size() ==0){
            //抛出异常
            throw new AddressBookBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }

        //2.向订单表插入一条数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,orders);
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(userId);

        orderMapper.insert(orders);


        List<OrderDetail> orderDetails = new ArrayList<>();
        //3.向订单明细表插入n条数据
        //遍历
        for (ShoppingCart cart : shoppingCarts) {
            //订单明细
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            //设置当前订单明细相关的订单id
            orderDetail.setOrderId(orders.getId());
            orderDetails.add(orderDetail);
        }

        orderDetailMapper.insertBatch(orderDetails);

        //4.清空当前用户的购物车数据
        shoppingCartMapper.deleteByUserId(userId);

        //5.封装VO返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder().
                id(orders.getId())
                .orderTime(orders.getDeliveryTime())
                .orderNumber(orders.getNumber())
                .orderAmount(orders.getAmount())
                .build();

        //通过websocket向客户端浏览器推送消息type orderId content
        Map map = new HashMap();
        map.put("type",1); // 1表示来单提醒 2表示客户催单
        map.put("orderId",orders.getId());
        map.put("content","订单号: " + orders.getNumber());

        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);

        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        // 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));



        return vo;

    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);


    }

    /**
     * 用户端订单分页查询
     * @param page
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int page, int pageSize, Integer status) {
        //先设置分页
        PageHelper.startPage(page,pageSize);

        //创建对象,并设置用户id和订单状态
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        //分页条件查询
        Page<Orders> page1 = orderMapper.pageQuery(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList<>();

        //查询出订单明细,并封装入OrderVo进行响应
        if (page1 != null && page1.getTotal() >  0){
            //遍历当前页的每个订单
            for (Orders orders : page1) {
                //获取当前订单的id
                Long ordersId = orders.getId();

                //查询订单明细
              List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(ordersId);

              //创建一个新的对象将订单信息复制到新对象中
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);

                //将查询到的订单明细信息放到orderVO对象中
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page1.getTotal(),list);
    }

    /**
     * 查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        //根据id查询订单
        OrderVO orderVO =  orderMapper.getById(id);

        //查询该订单对应的菜品或套餐明细
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderVO.getId());

        //将该订单及其详情封装到orderVO并返回
        OrderVO orderVO1 = new OrderVO();
        BeanUtils.copyProperties(orderVO,orderVO1);
        orderVO1.setOrderDetailList(orderDetailList);
        return orderVO1;
    }

    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void userCancelBy(Long id) throws Exception {
        //根据id查询订单
        OrderVO byId = orderMapper.getById(id);

        //校验订单是否存在
        if (byId == null){
            //要是校验不存在就抛出异常
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单的状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        //判断对订单状态进行检查要是大于2就不能直接取消订单
        if (byId.getStatus() > 2){
            //抛出异常
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setUserId(byId.getId());

        //订单处于待接单状态下取消,需要进行退款
        if (byId.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //调出微信支付退款接口
            weChatPayUtil.refund(
                    byId.getNumber(),//商户订单号
                    byId.getNumber(),//商户退款单号
                    new BigDecimal(0.01),//退款金额,单位:元
                    new BigDecimal(0.01));//原订单金额

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        //更新订单状态,取消原因,取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        //当前时间
        orders.setCancelTime(LocalDateTime.now());
        //返回给数据库
        orderMapper.update(orders);
    }

    /**
     * 再来一单
     * @param id
     */
    @Override
    public void repetition(Long id) {
        //查询当前用户id
        Long userId = BaseContext.getCurrentId();

        //根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        //将订单详情对象转换成购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            //将原本订单详情里面的菜品信息重新复制到购物车对象中去
            BeanUtils.copyProperties(x,shoppingCart,"id");
            //用户id
            shoppingCart.setUserId(userId);
            //当前时间
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;

        }).collect(Collectors.toList());

        //将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    /**
     * 订单搜索
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        //开启分页查询 根据传入的查询条件中的页码和每页数量进行分页
        PageHelper.startPage(ordersPageQueryDTO.getPage(),ordersPageQueryDTO.getPageSize());

        // 调用 orderMapper 的 pageQuery 方法进行条件分页查询，获取订单分页数据
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);

        //部分订单状态,需要额外返回订单菜品信息,将Orders转化为OrderVO
        List<OrderVO> orderVOList =  getOrderVOList(page);

        return new PageResult(page.getTotal(),orderVOList);
    }


    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        //需要返回订单菜品信息,自定义OrderVO响应结果
        List<OrderVO> orderVOList = new ArrayList<>();

        //获取分页数据中的订单列表
        List<Orders> ordersList = page.getResult();

        //检查订单列表是否为空
        if (!CollectionUtils.isEmpty(ordersList)){

            //遍历订单列表
            for (Orders orders : ordersList) {
                //将共同字段复制到OrderVO
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders,orderVO);
                //转成字符串
                String orderDishes = getOrderDishesStr(orders);

                //将订单菜品信息封装到orderVO中,并添加到orderVOList
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
            }
        }
        return orderVOList;
    }

    /**
     * 根据订单id获取菜品信息字符串
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        //查询订单菜品详情信息(订单中的菜品和数量)
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());

        //将每一条订单菜品信息拼接为字符串(格式: 宫保鸡丁*3; )
        List<String> orderDishList = orderDetailList.stream().map(x ->{
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return  orderDish;
        }).collect(Collectors.toList());

        //将该订单对应的所有菜品信息都拼接在一起
        return String.join("",orderDishList);
    }

    /**
     * 各个状态的订单数量统计
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        //根据状态,分别查询出待接单,待派送,派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);

        //将查询出的数据封装到orderStatisticsVO中响应
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();

        //将待接单,待派送,派送中的状态的订单数量设置到对象中
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);

        return orderStatisticsVO;
    }

    /**
     * 接单
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        //获取id,将订单状态更新
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();

        //将订单的状态更新操作同步到数据库
        orderMapper.update(orders);
    }

    /**
     * 拒单
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        //先根据id查询订单
        Orders ordersID = orderMapper.getById(ordersRejectionDTO.getId());

        //订单在只有存在且状态为2(待接单)才能拒单
        //判断
        if (ordersID == null && ordersID.getStatus().equals(Orders.TO_BE_CONFIRMED)){
            //抛出异常
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //支付状态
        Integer payStatus = ordersID.getPayStatus();
        //判断
        if (payStatus == Orders.PAID){
            //用户已支付,需要退款
            String refund = weChatPayUtil.refund(
                    ordersID.getNumber(),
                    ordersID.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款:{}",refund);
        }

        //拒单需要退款,根据订单id更新订单状态,拒单原因,取消时间
        Orders orders = new Orders();
        orders.setId(ordersID.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 取消订单
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) throws Exception {
        //根据id查询订单
        Orders ordersID = orderMapper.getById(ordersCancelDTO.getId());

        //支付状态
        Integer payStatus = ordersID.getPayStatus();
        //判断
        if (payStatus == 1){
            //用户已支付,需要退款
            String refund = weChatPayUtil.refund(
                    ordersID.getNumber(),
                    ordersID.getNumber(),
                    new BigDecimal(0.01),
                    new BigDecimal(0.01));
            log.info("申请退款:{}",refund);
        }

        //管理端取消订单需要退款,根据订单id更新订单状态,取消原因,取消时间
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 派送订单
     * @param id
     */
    @Override
    public void deliver(Long id) {
        //根据id查询订单
        Orders ordersID = orderMapper.getById(id);

        //校验订单是否存在,且状态为3(待派送)
        if (ordersID == null || ! ordersID.getStatus().equals(Orders.CONFIRMED)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        //创建新的对象,将查询到的id放到新对象中
        Orders orders = new Orders();
        orders.setId(ordersID.getId());

        //更新订单状态,状态为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);

        orderMapper.update(orders);
    }

    /**
     * 完成订单
     * @param id
     */
    @Override
    public void complete(Long id) {
        //根据id查询订单
        Orders ordersID = orderMapper.getById(id);

        //校验订单是否存在,且状态为4
        if (ordersID == null || ! ordersID.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersID.getId());

        //更新订单状态,状态转化完成
        orders.setStatus(Orders.COMPLETED);
        //当前时间
        orders.setCancelTime(LocalDateTime.now());

        orderMapper.update(orders);
    }

    /**
     * 客户催单
     *
     * @param id
     */
    @Override
    public void reminder(Long id) {
        //根据id查询订单
        Orders ordersID = orderMapper.getById(id);

        //校验订单是否存在
        if (ordersID == null ){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号: " + ordersID.getNumber());

        //通过websocket向客户端浏览器推送消息
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }


}
